xmcp
xmcp is a TypeScript framework for building Model Context Protocol (MCP) servers. It provides type-safe tool definitions, built-in authentication, HTTP and STDIO transport support, and one-command Vercel deployment.
Explanation
xmcp takes the complexity out of building MCP servers. Instead of implementing the protocol from scratch — handling transport negotiation, session management, capability discovery, and request routing — you focus on defining your tools, resources, and prompts as TypeScript functions. xmcp handles everything else. The framework is designed for the TypeScript/Node.js ecosystem with full type safety from tool schemas to response types. It supports both HTTP transport (for cloud deployment) and STDIO transport (for local tools) from the same codebase. Built-in authentication supports API keys, OAuth, and custom auth strategies. Deployment is a single Vercel command. xmcp also includes development tools for testing your MCP server locally, inspecting tool calls, and validating schemas before deployment.
Related Terms
Model Context Protocol (MCP)
Model Context Protocol (MCP) is an open standard that defines how AI assistants connect to external tools, data sources, and services. It provides a structured way for AI models to discover, understand, and use capabilities from any MCP-compatible server.
MCP Server
An MCP server is a service that implements the Model Context Protocol to expose tools, resources, and prompts to AI assistants. It handles connection management, capability negotiation, and request routing between AI clients and your underlying systems.
MCP Tools
MCP Tools are the action primitive in the Model Context Protocol. They let AI assistants perform operations — creating records, triggering deployments, sending messages, or any other action your service supports — by calling structured functions on your MCP server.
MCP Transport
MCP transports define how AI clients communicate with MCP servers. The protocol supports two transport types: HTTP (for cloud-deployed servers accessible over the internet) and STDIO (for local servers that communicate through standard input/output).
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